On Tue, Mar 21, 2017 at 11:08:34PM -0400, Bruce Momjian,,, wrote:
> > The e1000e driver *does* have statistics for pause frames transmitted
> > and received (run: "ethtool -S eth0| grep flow_control"). If you log
> > these every second then it should be possible to see what happens
> > around the time the TX watchdog fires. That could provide some clues
> > as to whether the NIC is behaving correctly.
>
> OK, I am running this after setting flow control on/default on the
> switch and Debian, and rebooting:
>
> daemon -- sh -c "while :; do date;ethtool -S eth0| grep flow_control;
> sleep 1;done > /root/ethtool"
>
> I will report back with the relevant logging lines once it hangs again.
OK, I have results of a hang after 24 hours of uptime. The hangs are
listed here via dmesg -T:
http://momjian.us/expire/eth0/dmesg.txt
showing the watchdog warning/hang/reset at 23:01 and port hang/reset at
23:10.
I have also produced the ethtool -S output every second for the entire
24-hour period, gziped, at:
http://momjian.us/expire/eth0/ethtool.gz
You will see reception of a large number of rx_flow_control_xoff
messages about 50 minutes before the hangs, and just before the hangs.
--
Bruce Momjian <br...@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
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